Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Omar Shamsi, MD

Obesity Medicine (Internal Medicine) Physician in Elmhurst, IL · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053599233

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Registry record

Entity type Individual (Type 1)

Name Dr. Omar Shamsi

Credential MD

Sex Male

Practice address 1200 S York St, Suite 1240, Elmhurst, IL, 60126

Phone (331) 221-6140

Fax (331) 221-3838

Enumeration date Feb 9, 2008

Last updated in NPPES Jul 15, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036125176 (IL) Secondary

207RB0002X Obesity Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036125176 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
01066903A	Other	IN	INDIANA PROFESSIONAL LICENSING AGENCY MEDICAL LICENSING BOARD
200967190A	Medicaid	IN	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Omar Shamsi?

Omar Shamsi is registered in NPPES with the primary taxonomy of Obesity Medicine (Internal Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-15.